3W15:
reference: Crystal structure of peroxisomal targeting signal-2 bound to its receptor complex Pex7p-Pex21p., Pan D, Nakatsu T, Kato H, Nat Struct Mol Biol. 2013 Aug;20(8):987-93. doi: 10.1038/nsmb.2618. Epub 2013 Jun, 30. PMID: 23812376

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).